JP7412955B2 - solid cosmetics - Google Patents

Description

The present invention relates to solid cosmetics.

Make-up cosmetics such as foundations are required to spread well, be smooth, and have an excellent feel when used. For example, Patent Document 1 describes that a makeup cosmetic containing organopolysiloxane elastomer spherical powder with a specific particle size and porous powder has both a silky feel and a smooth and soft feel. has been done.

Japanese Patent Application Publication No. 7-258026

However, conventional cosmetics have the problem that when the cosmetics are taken up with a sponge or the like and spread on the skin, there is a feeling of resistance due to the sponge, the cosmetics do not spread well, and the skin becomes sticky after application.

The present inventors have discovered that by using a combination of specific inorganic spherical powder, plate-shaped powder, spherical silicone elastomer, and non-volatile silicone oil in specific proportions, the inventors can apply an appropriate amount when removing cosmetics with a sponge or the like. It has been found that a solid cosmetic can be obtained, which can be removed, has good spreadability, suppresses the feeling of resistance caused by the sponge when spread on the skin with a sponge, and has suppressed stickiness on the skin after application.

The present invention comprises the following components (A), (B), (C) and (D):
(A) 3-20% by mass of inorganic spherical powder with an oil absorption of 1 mL/g or more and a volume average particle size of 1-50 μm;
(B) 3 to 20% by mass of plate-shaped powder with a volume average particle diameter of 20 to 50 μm,
(C) 5 to 20% by mass of a spherical silicone elastomer with an oil absorption of less than 1 mL/g and a volume average particle size of 1 to 20 μm;
(D) 20 to 50% by mass of non-volatile silicone oil with a viscosity of 100 mPa・s or less at 25°C
The present invention relates to a solid cosmetic containing.

The solid cosmetic of the present invention allows an appropriate amount to be taken out with a sponge or the like, suppresses the feeling of resistance caused by the sponge when spread on the skin, and spreads well. It suppresses the stickiness of the skin.

The inorganic spherical powder of component (A) used in the present invention has an oil absorption of 1 mL/g or more and a volume average particle diameter of 1 to 50 μm. From the viewpoint of improving spreadability, suppressing the feeling of resistance due to the sponge when spread on the skin, and suppressing stickiness of the skin after application, the oil absorption amount is preferably 1 to 3 mL/g, more preferably 1 to 2 mL/g. Preferably, 1.2 to 2 mL/g is more preferable. In addition, from the viewpoint of improving spreadability, suppressing the feeling of resistance due to the sponge when spread on the skin, and suppressing stickiness of the skin after application, the volume average particle size is preferably 2 to 30 μm, and 5 to 5 μm. 30 μm is more preferable.

In the present invention, oil absorption is measured with reference to the method for measuring oil absorption of pigments specified in JIS K5101-13-2:2004. Specifically, first, 1 g of powder was placed on a glass plate, and dimethylpolysiloxane (KF-96A (6cs) manufactured by Shin-Etsu Silicone Co., Ltd.) was added using a pipette. KF-96A (6cs, manufactured by Shin-Etsu Silicone Co., Ltd.) was dropped little by little, and the powder and dimethylpolysiloxane were kneaded each time using a palette knife. Once the powder and dimethylpolysiloxane have turned into a hard paste, knead the dimethylpolysiloxane drop by drop, and measure the oil absorption by adding the last drop of dimethylpolysiloxane and the paste suddenly softens and begins to flow. as the end point. The volume (mL) obtained by dividing the amount (g) of dimethylpolysiloxane when the end point was reached by the specific gravity (0.925) of dimethylpolysiloxane was defined as the oil absorption amount per 1 g of powder. In the JIS method, boiled linseed oil is used as the oil, but in the present invention, the interaction between component (A) and component (C) and dimethyl polysiloxane is considered to be part of the effect of the present invention. Polysiloxane was used.
In addition, the end point is that the paste suddenly becomes soft after dropping the last drop of dimethylpolysiloxane, place more than half of the paste on a palette knife, tilt the flat side of the palette knife at 90 degrees to the ground, and wait within 10 seconds. (If the paste did not fall within 10 seconds, it was not determined that the paste was finished).
In addition, drop the dimethylpolysiloxane onto the powder and press the dimethylpolysiloxane onto the powder twice with a palette knife. If the dimethylpolysiloxane and the powder clearly do not mix, set the oil absorption amount to 0 mL/g. did.

In the present invention, the volume average particle diameter is measured using a laser diffraction scattering particle size distribution analyzer (manufactured by Seishin Enterprise Co., Ltd., LMS-350). Further, in the present invention, the volume average particle size is a volume-based average particle size, and is defined as a 50% median diameter.

The spherical shape in the inorganic spherical powder of component (A) includes true spheres, substantially spherical shapes, and spheroids, and may also be spherical powders with uneven surfaces.
Such spherical powders are those used in ordinary cosmetics, such as silica, calcium silicate, magnesium silicate, etc., which improve spreadability and suppress the feeling of resistance caused by sponges when spread on the skin. However, from the viewpoint of suppressing stickiness of the skin after application, silica is preferable, and porous silica is more preferable.
In addition, as silica, Sunsphere H-122 (manufactured by AGC SITEC Co., Ltd.; oil absorption 1.65 mL/g, volume average particle diameter 12 μm), Silica Microbead LB-1500 (manufactured by JGC Catalysts & Chemicals Co., Ltd.; oil absorption 2.30 mL) /g, volume average particle diameter 5 μm) and the like can be used.

Ingredient (A) can be used alone or in combination of two or more, and the content is such that an appropriate amount can be taken when removing the cosmetic with a sponge, etc., it can improve spreadability, and when applied to the skin. From the viewpoint of suppressing the feeling of resistance caused by the sponge and the stickiness of the skin after application, the amount is 3 to 20% by mass, preferably 5 to 18% by mass, and more preferably 8 to 13% by mass in the total composition.

The plate-like powder of component (B) used in the present invention has a volume average particle size of 20 to 50 μm. From the viewpoint of being able to take an appropriate amount of cosmetics with a sponge or the like, the volume average particle diameter is preferably 22 to 45 μm, more preferably 25 to 38 μm.
In addition, the aspect ratio of the plate-shaped powder of component (B) is preferably 40 to 400, more preferably 50 to 300, from the viewpoint of being able to take an appropriate amount when removing the cosmetic with a sponge or the like. , 70 to 200 are more preferable.
In the present invention, the aspect ratio is calculated from the ratio of the volume average particle diameter to the average thickness of the particles, and is defined as aspect ratio=(volume average particle diameter/average thickness).
The average thickness of the particles is determined by averaging the thicknesses of 10 to 50 base particles observed and measured using a scanning electron microscope or a transmission electron microscope.

The plate-like powder of component (B) is one used in ordinary cosmetics, such as mica such as synthetic fluorophlogopite, muscovite, phlogopite, red mica, biotite, and lithium mica; Titanium mica coated with titanium oxide, zinc oxide plate, titanium oxide plate, cerium oxide plate, barium sulfate, talc, kaolin plate, sericite, silica plate, hydroxyapatite plate, ceramic powder plate, plate Examples include plate-shaped alumina, plate-shaped boron nitride, plate-shaped polymethyl methacrylate powder, plate-shaped iron oxide, aluminum, plate-shaped glass powder, and the like.

The plate-like powder of component (B) can be taken in an appropriate amount when removing cosmetics with a sponge, etc., from the viewpoint of improving spreadability and suppressing the feeling of resistance caused by the sponge when spread on the skin. One or more types selected from mica, talc, and titanium mica are preferable, one or more types selected from mica and talc are more preferable, and mica is even more preferable.
In addition, as mica, FA-450 (manufactured by Yamaguchi Mica Co., Ltd., volume average particle size 28 μm, aspect ratio 73), SA-350 (manufactured by Yamaguchi Mica Co., Ltd., volume average particle size 42 μm, aspect ratio 80), Y-3000 (manufactured by Yamaguchi Mica Co., Ltd., volume average particle size 42 μm, aspect ratio 80), Commercially available products such as those manufactured by Mica Corporation, volume average particle diameter 23 μm, aspect ratio 70) can be used.

The plate-like powder of component (B) can be used as it is, or if necessary, it can be used after being subjected to hydrophobization treatment.
In addition, when plate-shaped powder is hydrophobized, its volume average particle diameter, particle thickness, and content are the same as the content including the hydrophobized agent, volume average particle diameter, and particle thickness. means.
Examples of the hydrophobic treatment include silicone treatment, fluorine treatment, fatty acid treatment, and N-acyl amino acid treatment. Examples of silicone treatment include methylhydrogenpolysiloxane treatment, dimethylpolysiloxane treatment, alkyl alkoxysilane treatment, etc.; examples of fluorine treatment include perfluoroalkyl phosphate treatment, perfluoroalkyl alkoxysilane treatment, etc. Examples of the fatty acid treatment include stearic acid treatment, myristic acid treatment, etc., and examples of the N-acyl amino acid treatment include lauroyl lysine treatment, dilauroylglutamate lysine Na treatment, stearoylglutamate disodium treatment, lauroyl aspartate Na treatment, etc. . Among these, silicone treatment is preferred from the viewpoint of improving spreadability and suppressing the feeling of resistance due to the sponge when spread on the skin.
The hydrophobization treatment may be carried out by dry treatment, wet treatment, etc. using a conventional method.

Ingredient (B) can be used alone or in combination of two or more, and the content is such that an appropriate amount can be taken when removing the cosmetic with a sponge, etc., it can improve spreadability, and when applied to the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge and the stickiness of the skin after application, the amount is 3 to 20% by mass, preferably 4 to 18% by mass, and more preferably 8 to 13% by mass in the total composition.

The spherical silicone elastomer of component (C) has an oil absorption of less than 1 mL/g and a volume average particle diameter of 1 to 20 μm. From the viewpoint of improving spreadability, suppressing the feeling of resistance due to the sponge when spread on the skin, and suppressing stickiness of the skin after application, the oil absorption amount is preferably 0.2 or more and less than 1 mL/g, and 0. .3 to 0.8 mL/g is more preferable, and 0.4 to 0.6 mL/g is even more preferable. In addition, from the viewpoint of improving spreadability, suppressing the feeling of resistance due to the sponge when spread on the skin, and suppressing stickiness of the skin after application, the volume average particle size is preferably 2 to 14 μm, and 3 to 3 μm. 8 μm is more preferable.

The spherical shape in component (C) includes a true sphere, a substantially spherical shape, and a spheroid, and may also be a spherical powder having an uneven surface.
Such spherical silicone elastomers are those used in ordinary cosmetics, such as (diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer, (vinyl dimethicone/methicone silsesquioxane) crosspolymer, and (dimethicone) crosspolymer. /vinyl dimethicone) cross polymer, (dimethicone/phenyl vinyl dimethicone) cross polymer, (vinyl dimethicone/lauryl dimethicone) cross polymer, etc., which improve spreadability and suppress the feeling of resistance caused by sponges when spread on the skin. Selected from (diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer, vinyl dimethicone/methicone silsesquioxane) crosspolymer, and (dimethicone/vinyl dimethicone) crosspolymer from the viewpoint of suppressing skin stickiness after application. One or more types selected from (diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer and vinyl dimethicone/methicone silsesquioxane) crosspolymer are more preferable, (Diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer is more preferred.
In addition, as a (diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane) crosspolymer, a commercially available product such as KSP-300 (manufactured by Shin-Etsu Chemical Co., Ltd.; oil absorption 0.48 mL/g, volume average particle diameter 5 μm) may be used. I can do it.

Ingredient (C) can be used alone or in combination of two or more, and the content is such that it can be taken in an appropriate amount when removing the cosmetic with a sponge, etc., improves spreadability, and improves smoothness when applied to the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge and the stickiness of the skin after application, the amount is 5 to 20% by mass, preferably 6 to 18% by mass, and more preferably 9 to 13% by mass in the total composition.

In the present invention, the mass ratio (A)/(C) of component (A) to component (C) is such that an appropriate amount can be taken when applying the cosmetic with a sponge, etc., and it improves spreadability and spreads it onto the skin. From the viewpoint of suppressing the feeling of resistance caused by the sponge when applying and suppressing the stickiness of the skin after application, it is preferably 0.1 to 10, more preferably 0.2 to 6, and even more preferably 0.4 to 2. Preferably, 0.63 to 1.25 is even more preferable.

In the present invention, the mass ratio (B)/(C) of component (B) to component (C) is such that an appropriate amount can be taken when applying the cosmetic with a sponge, etc., and it improves spreadability and spreads evenly onto the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge when applied and suppressing the stickiness of the skin after application, it is preferably 0.1 to 10, more preferably 0.3 to 5, and even more preferably 0.58 to 2. Preferably, 0.8 to 1.25 is even more preferable.

Regarding the non-volatile silicone oil of component (D) used in the present invention, non-volatile means that the mass loss rate after spreading 1 g of the oil in a glass Petri dish with a diameter of 48 mm and leaving it for 24 hours at 25°C and normal pressure is 1% or less. It is.
The silicone oil of component (D) has a viscosity of 100 mPa・s or less at 25°C, improves spreadability, suppresses the feeling of resistance caused by a sponge when spread on the skin, and suppresses stickiness of the skin after application. Therefore, it is preferably 1 to 100 mPa·s, more preferably 2 to 50 mPa·s, and even more preferably 5 to 20 mPa·s.
In the present invention, the viscosity is measured using a B-type viscometer (TV-B type, Tokyo Keiki) and rotor No. 1. Measured at a rotation speed of 60 rpm.

The silicone oil of component (D) is one commonly used in cosmetics, such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane; polyether-modified silicone, alkyl-modified silicone, higher fatty acid ester-modified silicone. Examples include modified silicone oils such as silicone, higher alkoxy-modified silicone, fluorine-modified silicone, and crosslinked organopolysiloxane.
Among these, dimethylpolysiloxane is preferred from the viewpoint of improving spreadability, suppressing the feeling of resistance caused by a sponge when spread on the skin, and suppressing stickiness of the skin after application.

Ingredient (D) can be used alone or in combination of two or more, and the content is such that an appropriate amount can be taken when removing the cosmetic with a sponge, etc., it improves spreadability, and when applied to the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge and the stickiness of the skin after application, the amount is 20 to 50% by mass, preferably 23 to 45% by mass, and more preferably 28 to 35% by mass in the total composition.

In the present invention, the mass ratio (C)/(D) of component (C) to component (D) is such that an appropriate amount can be taken when removing the cosmetic with a sponge, etc., and it improves spreadability and spreads evenly onto the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge when applying and suppressing the stickiness of the skin after application, it is preferably 0.1 to 4, more preferably 0.15 to 1, and 0.2 to 0.45. is more preferable, and 0.24 to 0.37 is even more preferable.

The solid cosmetic of the present invention may further contain (E) a liquid non-volatile oil other than component (D). Here, the term "liquid" refers to an oil component that has fluidity at 25° C., and includes a paste-like oil component as long as it has fluidity.
Such non-volatile oils include those used in ordinary cosmetics, such as liquid paraffin, light isoparaffin, liquid isoparaffin, mineral oil, squalane, straight chain or branched hydrocarbon oils such as squalene; avocado oil, macadamia nut oil; , vegetable oils such as olive oil, rapeseed oil, sesame oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, palm oil, coconut oil, castor oil, jojoba oil, sunflower oil, camellia oil, corn oil; animal oils such as liquid lanolin; Monos such as isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, isotridecyl isononanoate, butyl stearate, oleyl oleate, octyldodecyl ricinoleate, octyl hydroxystearate, 2-ethylhexyl paramethoxycinnamate, etc. Ester oils, neopentyl glycol dicaprate, diisostearyl malate, polyglyceryl diisostearate, polyglyceryl triisostearate, glyceryl diisostearate, diester oils such as di(phytosteryl/octyldodecyl) lauroylglutamate, glyceryl triisostearate, tri( Fatty acid esters such as triester oils such as caprylic/capric acid) glyceryl, glyceryl tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, and trimethylolpropane triisostearate; fluoropolyether, perfluoroalkyl Fluorine oils such as ether silicone; silicone oils other than component (D); and the like.
Among these, one or two types selected from hydrocarbon oils and fatty acid ester oils from the viewpoint of improving spreadability, suppressing the feeling of resistance caused by sponges when spread on the skin, and suppressing stickiness of the skin after application. The above are preferable, one or more selected from fatty acid ester oils are more preferable, one or more selected from monoester oils and diester oils are even more preferable, 2-ethylhexyl para-methoxycinnamate, dicapric acid One or more selected from neopentyl glycol and di(phytosteryl/octyldodecyl) lauroylglutamate are even more preferred.

Ingredient (E) can be used alone or in combination of two or more, and the content is such that an appropriate amount can be taken when removing the cosmetic with a sponge, etc., it improves spreadability, and when applied to the skin. From the viewpoint of suppressing the feeling of resistance due to the sponge and suppressing the stickiness of the skin after application, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 7% by mass, and 1 to 5% by mass in the total composition. is even more preferable.

The solid cosmetic of the present invention can further contain a colored pigment.
Coloring pigments include, for example, metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, navy blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; Furthermore, inorganic pigments such as carbon black; Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red 228 No., Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, Blue No. 404, etc. synthetic organic pigments; natural organic pigments such as β-carotene, caramel, paprika pigments, etc.

These colored pigments can also be used after being subjected to hydrophobization treatment by a conventional method, similarly to component (B).

One or more types of coloring pigments can be used, and the content is preferably 1 to 50% by mass in the total composition, and 5 to 40% by mass from the viewpoint of improving coverage and natural finish. More preferably, 10 to 30% by mass is even more preferred.

In addition to the above-mentioned ingredients, the solid cosmetic of the present invention includes ingredients used in ordinary cosmetics, such as powders other than the above, oily ingredients other than the above, surfactants, fragrances, humectants, beauty ingredients, and medicinal ingredients. , ultraviolet absorbers, thickeners, bactericides, pH adjusters, antioxidants, preservatives, inorganic salts, water, and the like.

The solid cosmetic of the present invention can be produced by a conventional method, and can be an oil-based solid cosmetic, an emulsified solid cosmetic, a powdered solid cosmetic, or the like.
For example, a solid cosmetic can be obtained by mixing powder phase components, adding a mixture of oil phase components thereto, and filling and molding the mixture into a container such as a metal tray. For mixing, in addition to a general mixer such as a Henschel mixer, a high-viscosity mixer such as a planetary mixer or a kneader can be used. Further, for filling and molding, an extrusion type device such as a clay kneader or an extruder can be used.
The solid cosmetics of the present invention are suitable as makeup cosmetics such as foundations, makeup bases, concealers, lip balms, blushers, and eye shadows.

Examples 1 to 9 and Comparative Examples 1 to 2 (solid foundation)
Solid cosmetics having the compositions shown in Tables 1 and 2 were produced, and the amount of solid cosmetics removed, spreadability, lack of resistance when applied with a sponge, and lack of stickiness on the skin after application were evaluated. The results are also shown in Tables 1 and 2.

(Production method)
The powder phase was mixed in a Henschel mixer. A mixture of the oil phase was added thereto, and a metal medium plate (thickness 0.7 mm, depth 5 mm, diameter 5.3 mm) was filled and molded to obtain a solid foundation.

(Evaluation method)
(1) Amount of solid cosmetic removed:
A professional evaluator uses a cosmetic sponge (Kao Sofina Primavista Beautiful Skin Texture Powder Foundation Sponge) to apply the same amount of pressure (approximately 500 to 700 gf) as in normal use to rub off the surface of the cosmetic. (g) was weighed. The results were shown as the average value of three expert evaluators.
Note that the amount taken is preferably in the range of 0.02 to 0.06 g.

(2) Elongation:
A professional evaluator used a cosmetic sponge (Kao Sofina Primavista Beautiful Skin Texture Powder Foundation Sponge) to scrape off the surface of the cosmetic, remove 0.05g, and rate the spread when applied to the face using the following five grades: It was evaluated by The results were shown as the total score of three expert evaluators.
5: Very easy to stretch.
4: Easy to stretch.
3: Slightly easy to stretch.
2: Difficult to stretch 1: Obviously difficult to stretch.

(3) No resistance when applied with a sponge:
A professional evaluator who has rough skin with scales such as dry skin uses a cosmetic sponge (Kao Sofina Primavista Clean Skin Texture Powder Foundation Sponge) to scrape off the surface of the cosmetic and remove 0.05 g. The lack of resistance when applied to the face was evaluated on the following five scales. The results were shown as the total score of three expert evaluators.
5: No resistance felt at all.
4: No sense of resistance is felt.
3: Some sense of resistance is felt.
2: A sense of resistance is felt.
1: A sense of resistance is clearly felt.

(4) No stickiness on the skin after application:
A professional evaluator used a cosmetic sponge (Kao Sofina Primavista Beautiful Skin Texture Powder Foundation Sponge) to scrape off the surface of the cosmetic, take 0.05g, and apply it to the face, and then evaluate the lack of stickiness on the skin. Evaluation was made on the following five levels. The results were shown as the total score of three expert evaluators.
5: No stickiness at all.
4: Almost no stickiness.
3: No stickiness.
2: There is stickiness.
1: Obviously sticky.

Prescription example 1
Solid cosmetics having the compositions shown in Table 3 were produced in the same manner as in the examples. The obtained solid cosmetic can be taken in an appropriate amount with a sponge, has a suppressed feeling of resistance when spread on the skin, spreads well, and suppresses stickiness on the skin after application.

Claims (4)

The following ingredients (A), (B), (C) and (D):
(A) 3-20% by mass of inorganic spherical powder with an oil absorption of 1 mL/g or more and 3 mL/g or less and a volume average particle size of 2-30 μm;
(B) 3 to 20% by mass of plate-shaped powder with a volume average particle diameter of 20 to 50 μm,
(C) 5-20% by mass of a spherical silicone elastomer with an oil absorption of 0.2 mL/g or more and less than 1 mL/g and a volume average particle size of 2-14 μm;
(D) 20 to 50% by mass of non-volatile silicone oil with a viscosity of 100 mPa・s or less at 25°C
Contains
A solid cosmetic whose oil absorption is measured using dimethylpolysiloxane (6cs) as the oil according to the measurement method specified in JIS K5101-13-2:2004 . The solid cosmetic according to claim 1, wherein the mass ratio (A)/(C) of component (A) to component (C) is 0.2 to 2 . The solid cosmetic according to claim 1 or 2, wherein the mass ratio (C)/(D) of component (C) to component (D) is 0.1 to 1 . The solid cosmetic according to any one of claims 1 to 3, further comprising (E) a liquid nonvolatile oil excluding component (D).